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sunrise-sunset.html
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sunrise-sunset.html
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<!DOCTYPE html>
<html>
<head>
<title>Sunrise and Sunset</title>
<link rel="shortcut icon" type="image/x-icon" href="favicon.ico">
<style>
body {background-color: #222; position: relative; left: 10px; width: 90vw; height: 90vh;}
a, h1, p, span {color: #fff; font-family: verdana;}
#slider {width: 720px};
.page {margin: 4px 0px; display: block;}
</style>
</head>
<body>
<h1>Sunrise and Sunset</h1>
<p>Sunrise and sunset with the HTML Canvas. Adjust the slider for different times.</p>
<canvas id="myCanvas" width="720" height="480"></canvas>
<br>
<input type="range" id="slider" min=0 max=1440>
<script>
let c = document.getElementById("myCanvas");
let ctx = c.getContext("2d");
setInterval(function() {
ctx.clearRect(0, 0, c.width, c.height);
let time = Number(slider.value);
let sunCycle = time * Math.PI / -720;
if (time < 300 || time > 1140) {brightness = 0;}
if (time > 420 && time < 1020) {brightness = 1;}
if (time >= 300 && time <= 420) {brightness = time / 120 - 2.5;}
if (time >= 1020 && time <= 1140) {brightness = time / -120 + 9.5;}
ctx.fillStyle = "hsl(" + (250 - brightness * 60) + ", 80%, " + (10 + brightness * 60) + "%)";
ctx.fillRect(0, 0, 720, 480);
ctx.beginPath();
ctx.arc(360 + Math.sin(sunCycle) * 200, 300 + Math.cos(sunCycle) * 200, 40, 0, 2 * Math.PI);
ctx.fillStyle = "hsl(" + (brightness * 60) + ", 100%, 50%)";
ctx.fill();
ctx.fillStyle = "hsl(120, 60%," + (10 + brightness * 30) + "%)"
ctx.fillRect(0, 300, 720, 180);
ctx.fillStyle = "hsl(120, 60%," + (10 + brightness * 20) + "%)";
ctx.fillRect(360, 320, Math.sin(sunCycle) ** 3 * -420, 40);
ctx.fillStyle = "hsl(40, 60%," + (5 + brightness * 25) + "%)";
ctx.fillRect(330, 240, 60, 120);
ctx.fillStyle = "hsl(120, 60%," + (10 + brightness * 30) + "%)";
ctx.beginPath();
ctx.arc(360, 180, 80, 0, 2 * Math.PI);
ctx.fill();
let hours = Math.floor(time / 60) % 24;
if (hours < 10) {hours = "0" + hours;}
let minutes = Math.floor(time) % 60;
if (minutes < 10) {minutes = "0" + minutes;}
let displayText = hours + "\uA789" + minutes;
ctx.fillStyle = "#fff";
ctx.font = "75px Arial";
ctx.textAlign = "center";
ctx.fillText(displayText, 360, 450);
});
</script>
</body>
</html>